Active Member
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[China]
Address: 21/F, Building 1, No. 816,Jinghua Road, Hi-tech Zone,Ningbo, Zhejiang, P.R. China
Contact name:Tony ma
Ningbo Tian'an Jinghua Power Technology Co., Ltd. |
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24kv Vacuum Are - extinguishing Chamber High Voltage AC Vacuum Circuit Breaker
NINGBO TIANAN (GROUP) CO., LTD.
Overview
VT19-24indoor HV vacuum circuit breaker is used in three-phase AC electric system of 50HZ,24kV. It is used as control and protection department in the mining company ,power factory and substation. Because of its special advantages, it is also suitable for the site which frequently operation under rated current or multiple breaking short-circuit current.
The circuit breaker is identified by some national standards and international relative standards, such as GB1984,GB/T11022,DL/T403 and IEC62271, etc. It has reliable lockage, used as truck department or fixed installation department.
Type designation
Service condition
Normal condition
Ambient temperature +40℃~-25℃
Ambient humidity Daily average relative humidity ≤95%
Daily average stream pressure ≤2.2ⅹ10-3MPa
Monthly average relative humidity ≤90%
Monthly average stream pressure ≤1.8ⅹ10-3Mpa
Elevation ≤1000m(If it is 12kV, ≤4000m)
Degree of earthquake <8
The site has no water,no fire goods and explosion goods,no chemical
goods and serious quake
Special condition
If user has some special requirement, please negotiated by
manufacture and user.
The main parameter of 24KV circuit breaker
| Rated voltage | 24kV | ||
| Rated frequency | 50Hz | ||
| Rated lighting impulse withstand voltage | 125kV | ||
| Rated 1 min power frequency withstand voltage | 65kV | ||
| Rated operation sequence | O-0.3s-CO-180s-CO | ||
| Rated current (A) | 630,1250 | 1250,1600,2000,2500 | |
| Rated short circuit breaking current (r.m.s, kA) | 20/25 | 31.5 | |
| Rated short circuit making current (peak value, kA) | 50/63 | 80 | |
| Rated short time withstand current/short circuit continuous time (kA/s) | 20,25/4 | 31.5/4 | |
| Rated peak value withstand current (kA) | 50/63 | 80 | |
| Breaking times of rated short circuit(times) | 30 | ||
| Mechanical duration (times0 | 20000 | ||
| Weight (kg) | Fixed type | ≤250 | |
| Truck type | ≤350 | ||
| Name | Unit | Data | |
| Distance of contact terminal | mm | 12±1 | |
| Over-travel | 4±1 | ||
| Three-phase opening & closing asynchronous | ms | ≤2 | |
| Tripping time of closing contact terminal | ms | ≤2 | |
| Closing & opening time | Opening | ms | ≤50 |
| Closing | ≤70 | ||
| Average opening speed(after opening 6mm) | m/s | 1.4±0.3 | |
| Average closing speed(after closing 6mm) | 0.8±0.2 | ||
